| 摘要 |
To allow flexible security level switching according communication situations, a password holding section (18) holds a plurality of device authentication passwords, for example, a temporary password and a private password. The temporary password is valid only under a certain situation and the private password has a high level of confidentiality to increase the device security. A password management section (17) allows the user to add a new password to the password holding section (16) and delete an existing password therefrom. A password selecting section (18) selects the most suitable password for current connection from among passwords in the password holding section (16) according to a user event (21), information acquired by an external factor acquisition section (14), and information from a time control section (15). The selected password is output to a password checking section (19). <IMAGE> |
